{"schema_version":1,"airport":"51A","entries":[{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"311fcf4ebb16","priority":"fyi","category":"runway","kind":"changed","summary":"runway 10: controlling obstacle changed (now 12 ft tall, 334 ft from threshold, 134 ft left of centerline, clearance slope 11:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"150","new":"134"},{"field":"DIST_FROM_THR","old":"600","new":"334"},{"field":"OBSTN_CLNC_SLOPE","old":"10","new":"11"},{"field":"OBSTN_HGT","old":"40","new":"12"}]},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"7898cdd6f680","priority":"fyi","category":"runway","kind":"changed","summary":"runway 28: controlling obstacle changed (now 33 ft tall, 507 ft from threshold, 137 ft left of centerline, clearance slope 9:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"140","new":"137"},{"field":"DIST_FROM_THR","old":"368","new":"507"},{"field":"OBSTN_CLNC_SLOPE","old":"4","new":"9"},{"field":"OBSTN_HGT","old":"42","new":"33"}]}],"first_cycle":"2025-05-15","last_cycle":"2025-05-15"}